本文選題：MOFs + 功能化改性��； 參考：《濟(jì)南大學(xué)》2017年碩士論文

【摘要】：近年來,金屬有機(jī)骨架材料(MOFs)作為一種新型的多孔材料,因其在吸附、傳感、催化、儲(chǔ)氫、分離等方面的優(yōu)良性能而備受關(guān)注。本論文制備了多種金屬有機(jī)骨架材料應(yīng)用于磷酸鹽的吸附實(shí)驗(yàn)中,探究其對(duì)磷酸鹽的吸附效能,具體研究結(jié)果如下:(1)采用傳統(tǒng)水熱法,合成了MIL-101(Fe)及具有磁性的Fe_3O_4@MIL-101(Fe)材料,并對(duì)其進(jìn)行了X射線衍射(XRD)、傅里葉紅外光譜(FTIR)和掃描電鏡(SEM)表征,結(jié)果表明,MIL-101(Fe)成功地包覆于Fe_3O_4上,合成了核殼結(jié)構(gòu)的Fe_3O_4@MIL-101(Fe)。對(duì)Fe_3O_4@MIL-101(Fe)吸附磷酸鹽的性能進(jìn)行探究,包括吸附劑投加量、pH值、吸附時(shí)間對(duì)吸附過程的影響,并進(jìn)行了吸附動(dòng)力學(xué)和等溫線擬合,發(fā)現(xiàn)其符合擬二級(jí)動(dòng)力學(xué)及Langmuir吸附等溫線模型。與其他常見吸附劑相比,Fe_3O_4@MIL-101(Fe)具有很好的吸附效果。同時(shí),Fe_3O_4@MIL-101(Fe)在吸附后可以通過外加磁場(chǎng)實(shí)現(xiàn)快速分離,為磷酸鹽的去除提供了一種簡(jiǎn)便有效的方法。(2)采用水熱法合成了La-MOFs,并利用XRD、FTIR、SEM以及Zeta電位對(duì)其表征�？疾炝宋絼┩都恿�、pH值、吸附時(shí)間對(duì)磷酸鹽吸附過程的影響。結(jié)果表明La-MOFs吸附磷酸鹽的過程更符合擬二級(jí)動(dòng)力學(xué)模型和Langmuir等溫線模型,推斷出其吸附機(jī)理為靜電吸引和配體交換。此外,La-MOFs對(duì)磷酸根的吸附性能較Fe_3O_4@MIL-101(Fe)有了很大的提升,說明La-MOFs材料在磷酸鹽吸附方面有巨大潛能。(3)水熱合成NH2-La-MOFs材料并利用XRD、FTIR、SEM、能量色散X射線光譜(EDX)及Zeta電位進(jìn)行表征。對(duì)NH2-La-MOFs吸附磷酸根的性能進(jìn)行探究,考察了吸附劑投加量、pH值、吸附時(shí)間對(duì)其的影響。結(jié)果表明該材料對(duì)磷酸根的吸附效果較好,符合擬二級(jí)動(dòng)力學(xué)和Langmuir吸附等溫線模型。還通過對(duì)NH2-La-MOFs的連續(xù)在線原位衰減全反射傅里葉變換紅外光譜(ATR-FTIR)實(shí)驗(yàn),證明了NH2-La-MOFs對(duì)磷酸根的吸附存在化學(xué)吸附。
[Abstract]:In recent years, as a new type of porous material, metal organic framework material (MOFs) has attracted much attention because of its excellent properties in adsorption, sensing, catalysis, hydrogen storage and separation. In this paper, a variety of organometallic skeleton materials have been prepared in the adsorption experiments of phosphate, and the specific results are studied. As follows: (1) MIL-101 (Fe) and magnetic Fe_3O_4@MIL-101 (Fe) materials are synthesized by traditional hydrothermal method, and X ray diffraction (XRD), Fourier infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) are used to characterize them. The results show that MIL-101 (Fe) is coated in Fe_3O_4 and syntheses the nuclear shell structure. 101 (Fe) adsorption of phosphate, including the amount of adsorbents, the pH value, the effect of adsorption time on the adsorption process, and the adsorption kinetics and the isotherm fitting, found that it conforms to the pseudo two kinetics and the Langmuir adsorption isotherm model. Compared with other common adsorbents, Fe_3O_4@MIL-101 (Fe) has a good adsorption effect. At the same time, Fe_3O_4@MIL-101 (Fe) can be separated rapidly by applied magnetic field after adsorption. It provides a simple and effective method for phosphate removal. (2) La-MOFs was synthesized by hydrothermal method, and XRD, FTIR, SEM and Zeta potential were used to characterize it. The adsorption process of adsorbents, pH value and adsorption time on phosphate adsorption process were investigated. The results show that the La-MOFs adsorption process is more consistent with the quasi two stage kinetic model and the Langmuir isotherm model. It is concluded that the adsorption mechanism is electrostatic attraction and ligand exchange. In addition, the adsorption properties of La-MOFs on the phosphate root are much higher than that of Fe_3O_4@MIL-101 (Fe), indicating that the La-MOFs material has a phosphate adsorption. Great potential. (3) hydrothermal synthesis of NH2-La-MOFs material and characterization by XRD, FTIR, SEM, energy dispersive X ray spectroscopy (EDX) and Zeta potential. The properties of NH2-La-MOFs adsorbed on phosphate root were investigated and the effects of adsorbents on the dosage, pH value and adsorption time were investigated. The results showed that the adsorption effect of the material on phosphate was good and accords with the results. The quasi two order kinetics and the Langmuir adsorption isotherm model were simulated. The adsorption of NH2-La-MOFs on the adsorption of phosphoric acid was proved by the continuous on line in situ attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) experiment on the NH2-La-MOFs.

【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ424;X52

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